Powder charge.



. No.-683,l06. Patented Sept 24, 1901.

- -P.'DU BUIT.

POWDER CHARGE. I

(Application filed Sept. 27, 1900.)

(No Model ATENT Fries,

PAUL DU BUIT, or PARIS, FRANCE.

POWDER CHARGE.

SPECIFICATION forming part of Letters Patent No 683,106,datedffieptember 24,1901. Application filed $eptemher 27, 1900. SerialNo. 31,328. (No specimens.)

.1 aZt whom it may concern.- I v p Be it known that I, PAUL DU BUIT,civil engineer, of the city of Paris, 13 Rue Auber, in

Y the Republic of France, have invented new my previous application forLetters Patent No. 2,509, of January 23, 1900, and were not thereforeparticularly described therein.-

The object of my invention is to provide a powder that shall beslow-burning,as that term is understood in this ,art, so as to producean accelerating effect, and to accomplish this result I break thecontinuity of the mass of the powder by employing one 'or more sheets ofpowder of a suitable composition, each of which sheets carries a numberof elongated projections, to be then rolled up to form the charge. Theideatas in my pending application above noted) is to present to theaction of the detonator agradually-im creasing combustion-surface, andin addition in the present invention I rely not only on the taper ofthese elongations, but also upon the varying thickness of the sheetitself and on the difference in thickness and height of varying and. ofrespectively diiferent thickness.-

The teeth maybe of*any suitable shape, as-

the several sheets where a is employed.

According to the present invention the charge comprises substantiallyone or more sheets of powder which may be of a suitable thickness and ofvarious shapes, according to,

plurality of sheets the results to be attained by the combustion of thecharge. Each sheetis cut or otherwise shaped so as to resemble a combwith teeth of any suit-able'length and width, spaced as required, whichteeth may terminate in points or in fringes of any suitable length,pointed or not. I

Figure 1 illustrates a plurality of sheets A and B of varying thicknesspartly rolled up. Figs. 2 to 6 show sheets A. to A respectively,

out in diiferent forms, but not rolled Figs.

7 and S are end views illustrating sheets of triangular,rectangular,polygonal, regular,or

irregular, and the sheetsmay be'rolled up, if

required. The teeth may be arranged close together, so that there is nospace between them for the greater part of their length when the sheetis flat, but that spaces are formed between them when the sheet isrolled up. In some cases notches or grooves may be formed on one side ofthe sheet-that is to say, the notches or grooves do not extendcompletely through the 'sheetin which case the sheet should be rolled upwith the notches or grooves on the outside. Furthermore, the teeth maybe of equal orof very unequal and gradually-increasing width. The sheetof powder may be of uniforin or variable thickness and may graduallyincrease in height and in length, while the charge may be composed ofseveral superposed sheets of powder of the same thickness or ofdiiferent thicknesses placed one upon another and rolled up together orseparately. Finally, the charge hereinbefore described. may or may notoccupy all the available height, according to circumstances, and it mayadvantageously have a height a little greater than the cartridge, sothat in consequence ofthepressure of the projectile the comb-teeth arespread in such a manner as to be favorable to com-' bustion.

The several forms of elements hereinbefore described have a considerableinfluence on the combustion of the powder under pressure, and byselecting them judiciously the requirements of the ally complied with.

Having nowf ull y described and ascertained the nature. of my inventionl declare that what I claim is- A charge of powder consisting-of aplurality of sheets of suitable composition and of varying thickness,the said sheets provided projectile may be ration-;

with tapering elongations and being rolled up to present all of saidelongations in the same direction, substantially as and for the purposedescribed.

In testimony whereof I have-signed this specification in the presence oftwo subscribing witnesses.

PAUL DU BUIT.

Witnesses: v

ANTONIO FOMSONDO DE LACALLE, DOMINIQUE OAsALoNe'E.

